Question

Elijah wants to know the cross-sectional area of the circular pipe. He measures the diameter which he finds, to the nearest millimeter, to be 5 centimeters. To find the area of the circle, Elijah using the formula A=πr^2, where A is it the area of the circle and r is the radius. he uses 3.14 for π. what value does Elijah get for the area of circle? type is that number. (Hint:3 decimal points!)​

Answer 1

The area is 0.002m² to 3 dp

Explanation:

This problem bothers on the mensuration of flat shapes(I.e cross sectional area of pipe ) , this time the a circle.

It requires us to look for the area of the shape

Given data

Diameter d = 5cm

Converting to mm = 5/100= 0.05m

Radius of circle r=d/2=0.05/2 =0.025mm

Given the area of the circle

A=πr²

A=3.14*0.025²

A=0.0019m²

To 3 dp we have area as 0.002m²